1 /* natsemi.c: A Linux PCI Ethernet driver for the NatSemi DP8381x series. */
3 Written/copyright 1999-2001 by Donald Becker.
4 Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
5 Portions copyright 2001,2002 Manfred Spraul (manfred@colorfullife.com)
6 Portions copyright 2004 Harald Welte <laforge@gnumonks.org>
8 This software may be used and distributed according to the terms of
9 the GNU General Public License (GPL), incorporated herein by reference.
10 Drivers based on or derived from this code fall under the GPL and must
11 retain the authorship, copyright and license notice. This file is not
12 a complete program and may only be used when the entire operating
13 system is licensed under the GPL. License for under other terms may be
14 available. Contact the original author for details.
16 The original author may be reached as becker@scyld.com, or at
17 Scyld Computing Corporation
18 410 Severn Ave., Suite 210
21 Support information and updates available at
22 http://www.scyld.com/network/netsemi.html
23 [link no longer provides useful info -jgarzik]
27 * big endian support with CFG:BEM instead of cpu_to_le32
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/errno.h>
35 #include <linux/ioport.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/pci.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/skbuff.h>
42 #include <linux/init.h>
43 #include <linux/spinlock.h>
44 #include <linux/ethtool.h>
45 #include <linux/delay.h>
46 #include <linux/rtnetlink.h>
47 #include <linux/mii.h>
48 #include <linux/crc32.h>
49 #include <linux/bitops.h>
50 #include <linux/prefetch.h>
51 #include <asm/processor.h> /* Processor type for cache alignment. */
54 #include <asm/uaccess.h>
56 #define DRV_NAME "natsemi"
57 #define DRV_VERSION "2.1"
58 #define DRV_RELDATE "Sept 11, 2006"
62 /* Updated to recommendations in pci-skeleton v2.03. */
64 /* The user-configurable values.
65 These may be modified when a driver module is loaded.*/
67 #define NATSEMI_DEF_MSG (NETIF_MSG_DRV | \
72 static int debug = -1;
76 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
77 This chip uses a 512 element hash table based on the Ethernet CRC. */
78 static const int multicast_filter_limit = 100;
80 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
81 Setting to > 1518 effectively disables this feature. */
82 static int rx_copybreak;
84 static int dspcfg_workaround = 1;
86 /* Used to pass the media type, etc.
87 Both 'options[]' and 'full_duplex[]' should exist for driver
89 The media type is usually passed in 'options[]'.
91 #define MAX_UNITS 8 /* More are supported, limit only on options */
92 static int options[MAX_UNITS];
93 static int full_duplex[MAX_UNITS];
95 /* Operational parameters that are set at compile time. */
97 /* Keep the ring sizes a power of two for compile efficiency.
98 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
99 Making the Tx ring too large decreases the effectiveness of channel
100 bonding and packet priority.
101 There are no ill effects from too-large receive rings. */
102 #define TX_RING_SIZE 16
103 #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */
104 #define RX_RING_SIZE 32
106 /* Operational parameters that usually are not changed. */
107 /* Time in jiffies before concluding the transmitter is hung. */
108 #define TX_TIMEOUT (2*HZ)
110 #define NATSEMI_HW_TIMEOUT 400
111 #define NATSEMI_TIMER_FREQ 5*HZ
112 #define NATSEMI_PG0_NREGS 64
113 #define NATSEMI_RFDR_NREGS 8
114 #define NATSEMI_PG1_NREGS 4
115 #define NATSEMI_NREGS (NATSEMI_PG0_NREGS + NATSEMI_RFDR_NREGS + \
117 #define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */
118 #define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32))
121 * The nic writes 32-bit values, even if the upper bytes of
122 * a 32-bit value are beyond the end of the buffer.
124 #define NATSEMI_HEADERS 22 /* 2*mac,type,vlan,crc */
125 #define NATSEMI_PADDING 16 /* 2 bytes should be sufficient */
126 #define NATSEMI_LONGPKT 1518 /* limit for normal packets */
127 #define NATSEMI_RX_LIMIT 2046 /* maximum supported by hardware */
129 /* These identify the driver base version and may not be removed. */
130 static char version[] __devinitdata =
131 KERN_INFO DRV_NAME " dp8381x driver, version "
132 DRV_VERSION ", " DRV_RELDATE "\n"
133 KERN_INFO " originally by Donald Becker <becker@scyld.com>\n"
134 KERN_INFO " 2.4.x kernel port by Jeff Garzik, Tjeerd Mulder\n";
136 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
137 MODULE_DESCRIPTION("National Semiconductor DP8381x series PCI Ethernet driver");
138 MODULE_LICENSE("GPL");
140 module_param(mtu, int, 0);
141 module_param(debug, int, 0);
142 module_param(rx_copybreak, int, 0);
143 module_param(dspcfg_workaround, int, 1);
144 module_param_array(options, int, NULL, 0);
145 module_param_array(full_duplex, int, NULL, 0);
146 MODULE_PARM_DESC(mtu, "DP8381x MTU (all boards)");
147 MODULE_PARM_DESC(debug, "DP8381x default debug level");
148 MODULE_PARM_DESC(rx_copybreak,
149 "DP8381x copy breakpoint for copy-only-tiny-frames");
150 MODULE_PARM_DESC(dspcfg_workaround, "DP8381x: control DspCfg workaround");
151 MODULE_PARM_DESC(options,
152 "DP8381x: Bits 0-3: media type, bit 17: full duplex");
153 MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)");
158 I. Board Compatibility
160 This driver is designed for National Semiconductor DP83815 PCI Ethernet NIC.
161 It also works with other chips in in the DP83810 series.
163 II. Board-specific settings
165 This driver requires the PCI interrupt line to be valid.
166 It honors the EEPROM-set values.
168 III. Driver operation
172 This driver uses two statically allocated fixed-size descriptor lists
173 formed into rings by a branch from the final descriptor to the beginning of
174 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
175 The NatSemi design uses a 'next descriptor' pointer that the driver forms
178 IIIb/c. Transmit/Receive Structure
180 This driver uses a zero-copy receive and transmit scheme.
181 The driver allocates full frame size skbuffs for the Rx ring buffers at
182 open() time and passes the skb->data field to the chip as receive data
183 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
184 a fresh skbuff is allocated and the frame is copied to the new skbuff.
185 When the incoming frame is larger, the skbuff is passed directly up the
186 protocol stack. Buffers consumed this way are replaced by newly allocated
187 skbuffs in a later phase of receives.
189 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
190 using a full-sized skbuff for small frames vs. the copying costs of larger
191 frames. New boards are typically used in generously configured machines
192 and the underfilled buffers have negligible impact compared to the benefit of
193 a single allocation size, so the default value of zero results in never
194 copying packets. When copying is done, the cost is usually mitigated by using
195 a combined copy/checksum routine. Copying also preloads the cache, which is
196 most useful with small frames.
198 A subtle aspect of the operation is that unaligned buffers are not permitted
199 by the hardware. Thus the IP header at offset 14 in an ethernet frame isn't
200 longword aligned for further processing. On copies frames are put into the
201 skbuff at an offset of "+2", 16-byte aligning the IP header.
203 IIId. Synchronization
205 Most operations are synchronized on the np->lock irq spinlock, except the
206 recieve and transmit paths which are synchronised using a combination of
207 hardware descriptor ownership, disabling interrupts and NAPI poll scheduling.
211 http://www.scyld.com/expert/100mbps.html
212 http://www.scyld.com/expert/NWay.html
213 Datasheet is available from:
214 http://www.national.com/pf/DP/DP83815.html
224 * Support for fibre connections on Am79C874:
225 * This phy needs a special setup when connected to a fibre cable.
226 * http://www.amd.com/files/connectivitysolutions/networking/archivednetworking/22235.pdf
228 #define PHYID_AM79C874 0x0022561b
231 MII_MCTRL = 0x15, /* mode control register */
232 MII_FX_SEL = 0x0001, /* 100BASE-FX (fiber) */
233 MII_EN_SCRM = 0x0004, /* enable scrambler (tp) */
237 NATSEMI_FLAG_IGNORE_PHY = 0x1,
240 /* array of board data directly indexed by pci_tbl[x].driver_data */
244 unsigned int eeprom_size;
245 } natsemi_pci_info[] __devinitdata = {
246 { "Aculab E1/T1 PMXc cPCI carrier card", NATSEMI_FLAG_IGNORE_PHY, 128 },
247 { "NatSemi DP8381[56]", 0, 24 },
250 static struct pci_device_id natsemi_pci_tbl[] __devinitdata = {
251 { PCI_VENDOR_ID_NS, 0x0020, 0x12d9, 0x000c, 0, 0, 0 },
252 { PCI_VENDOR_ID_NS, 0x0020, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
253 { } /* terminate list */
255 MODULE_DEVICE_TABLE(pci, natsemi_pci_tbl);
257 /* Offsets to the device registers.
258 Unlike software-only systems, device drivers interact with complex hardware.
259 It's not useful to define symbolic names for every register bit in the
262 enum register_offsets {
270 IntrHoldoff = 0x1C, /* DP83816 only */
297 /* These are from the spec, around page 78... on a separate table.
298 * The meaning of these registers depend on the value of PGSEL. */
305 /* the values for the 'magic' registers above (PGSEL=1) */
306 #define PMDCSR_VAL 0x189c /* enable preferred adaptation circuitry */
307 #define TSTDAT_VAL 0x0
308 #define DSPCFG_VAL 0x5040
309 #define SDCFG_VAL 0x008c /* set voltage thresholds for Signal Detect */
310 #define DSPCFG_LOCK 0x20 /* coefficient lock bit in DSPCFG */
311 #define DSPCFG_COEF 0x1000 /* see coefficient (in TSTDAT) bit in DSPCFG */
312 #define TSTDAT_FIXED 0xe8 /* magic number for bad coefficients */
314 /* misc PCI space registers */
315 enum pci_register_offsets {
329 enum ChipConfig_bits {
333 CfgAnegEnable = 0x2000,
335 CfgAnegFull = 0x8000,
336 CfgAnegDone = 0x8000000,
337 CfgFullDuplex = 0x20000000,
338 CfgSpeed100 = 0x40000000,
339 CfgLink = 0x80000000,
345 EE_ChipSelect = 0x08,
352 enum PCIBusCfg_bits {
356 /* Bits in the interrupt status/mask registers. */
357 enum IntrStatus_bits {
361 IntrRxEarly = 0x0008,
363 IntrRxOverrun = 0x0020,
368 IntrTxUnderrun = 0x0400,
373 IntrHighBits = 0x8000,
374 RxStatusFIFOOver = 0x10000,
375 IntrPCIErr = 0xf00000,
376 RxResetDone = 0x1000000,
377 TxResetDone = 0x2000000,
378 IntrAbnormalSummary = 0xCD20,
382 * Default Interrupts:
383 * Rx OK, Rx Packet Error, Rx Overrun,
384 * Tx OK, Tx Packet Error, Tx Underrun,
385 * MIB Service, Phy Interrupt, High Bits,
386 * Rx Status FIFO overrun,
387 * Received Target Abort, Received Master Abort,
388 * Signalled System Error, Received Parity Error
390 #define DEFAULT_INTR 0x00f1cd65
395 TxMxdmaMask = 0x700000,
397 TxMxdma_4 = 0x100000,
398 TxMxdma_8 = 0x200000,
399 TxMxdma_16 = 0x300000,
400 TxMxdma_32 = 0x400000,
401 TxMxdma_64 = 0x500000,
402 TxMxdma_128 = 0x600000,
403 TxMxdma_256 = 0x700000,
404 TxCollRetry = 0x800000,
405 TxAutoPad = 0x10000000,
406 TxMacLoop = 0x20000000,
407 TxHeartIgn = 0x40000000,
408 TxCarrierIgn = 0x80000000
413 * - 256 byte DMA burst length
414 * - fill threshold 512 bytes (i.e. restart DMA when 512 bytes are free)
415 * - 64 bytes initial drain threshold (i.e. begin actual transmission
416 * when 64 byte are in the fifo)
417 * - on tx underruns, increase drain threshold by 64.
418 * - at most use a drain threshold of 1472 bytes: The sum of the fill
419 * threshold and the drain threshold must be less than 2016 bytes.
422 #define TX_FLTH_VAL ((512/32) << 8)
423 #define TX_DRTH_VAL_START (64/32)
424 #define TX_DRTH_VAL_INC 2
425 #define TX_DRTH_VAL_LIMIT (1472/32)
429 RxMxdmaMask = 0x700000,
431 RxMxdma_4 = 0x100000,
432 RxMxdma_8 = 0x200000,
433 RxMxdma_16 = 0x300000,
434 RxMxdma_32 = 0x400000,
435 RxMxdma_64 = 0x500000,
436 RxMxdma_128 = 0x600000,
437 RxMxdma_256 = 0x700000,
438 RxAcceptLong = 0x8000000,
439 RxAcceptTx = 0x10000000,
440 RxAcceptRunt = 0x40000000,
441 RxAcceptErr = 0x80000000
443 #define RX_DRTH_VAL (128/8)
461 WakeMagicSecure = 0x400,
462 SecureHack = 0x100000,
464 WokeUnicast = 0x800000,
465 WokeMulticast = 0x1000000,
466 WokeBroadcast = 0x2000000,
468 WokePMatch0 = 0x8000000,
469 WokePMatch1 = 0x10000000,
470 WokePMatch2 = 0x20000000,
471 WokePMatch3 = 0x40000000,
472 WokeMagic = 0x80000000,
473 WakeOptsSummary = 0x7ff
476 enum RxFilterAddr_bits {
477 RFCRAddressMask = 0x3ff,
478 AcceptMulticast = 0x00200000,
479 AcceptMyPhys = 0x08000000,
480 AcceptAllPhys = 0x10000000,
481 AcceptAllMulticast = 0x20000000,
482 AcceptBroadcast = 0x40000000,
483 RxFilterEnable = 0x80000000
486 enum StatsCtrl_bits {
493 enum MIntrCtrl_bits {
501 #define PHY_ADDR_NONE 32
502 #define PHY_ADDR_INTERNAL 1
504 /* values we might find in the silicon revision register */
505 #define SRR_DP83815_C 0x0302
506 #define SRR_DP83815_D 0x0403
507 #define SRR_DP83816_A4 0x0504
508 #define SRR_DP83816_A5 0x0505
510 /* The Rx and Tx buffer descriptors. */
511 /* Note that using only 32 bit fields simplifies conversion to big-endian
520 /* Bits in network_desc.status */
521 enum desc_status_bits {
522 DescOwn=0x80000000, DescMore=0x40000000, DescIntr=0x20000000,
523 DescNoCRC=0x10000000, DescPktOK=0x08000000,
526 DescTxAbort=0x04000000, DescTxFIFO=0x02000000,
527 DescTxCarrier=0x01000000, DescTxDefer=0x00800000,
528 DescTxExcDefer=0x00400000, DescTxOOWCol=0x00200000,
529 DescTxExcColl=0x00100000, DescTxCollCount=0x000f0000,
531 DescRxAbort=0x04000000, DescRxOver=0x02000000,
532 DescRxDest=0x01800000, DescRxLong=0x00400000,
533 DescRxRunt=0x00200000, DescRxInvalid=0x00100000,
534 DescRxCRC=0x00080000, DescRxAlign=0x00040000,
535 DescRxLoop=0x00020000, DesRxColl=0x00010000,
538 struct netdev_private {
539 /* Descriptor rings first for alignment */
541 struct netdev_desc *rx_ring;
542 struct netdev_desc *tx_ring;
543 /* The addresses of receive-in-place skbuffs */
544 struct sk_buff *rx_skbuff[RX_RING_SIZE];
545 dma_addr_t rx_dma[RX_RING_SIZE];
546 /* address of a sent-in-place packet/buffer, for later free() */
547 struct sk_buff *tx_skbuff[TX_RING_SIZE];
548 dma_addr_t tx_dma[TX_RING_SIZE];
549 struct net_device *dev;
550 struct napi_struct napi;
551 struct net_device_stats stats;
552 /* Media monitoring timer */
553 struct timer_list timer;
554 /* Frequently used values: keep some adjacent for cache effect */
555 struct pci_dev *pci_dev;
556 struct netdev_desc *rx_head_desc;
557 /* Producer/consumer ring indices */
558 unsigned int cur_rx, dirty_rx;
559 unsigned int cur_tx, dirty_tx;
560 /* Based on MTU+slack. */
561 unsigned int rx_buf_sz;
563 /* Interrupt status */
565 /* Do not touch the nic registers */
567 /* Don't pay attention to the reported link state. */
569 /* external phy that is used: only valid if dev->if_port != PORT_TP */
571 int phy_addr_external;
572 unsigned int full_duplex;
576 /* FIFO and PCI burst thresholds */
577 u32 tx_config, rx_config;
578 /* original contents of ClkRun register */
580 /* silicon revision */
582 /* expected DSPCFG value */
584 int dspcfg_workaround;
585 /* parms saved in ethtool format */
586 u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */
587 u8 duplex; /* Duplex, half or full */
588 u8 autoneg; /* Autonegotiation enabled */
589 /* MII transceiver section */
598 static void move_int_phy(struct net_device *dev, int addr);
599 static int eeprom_read(void __iomem *ioaddr, int location);
600 static int mdio_read(struct net_device *dev, int reg);
601 static void mdio_write(struct net_device *dev, int reg, u16 data);
602 static void init_phy_fixup(struct net_device *dev);
603 static int miiport_read(struct net_device *dev, int phy_id, int reg);
604 static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data);
605 static int find_mii(struct net_device *dev);
606 static void natsemi_reset(struct net_device *dev);
607 static void natsemi_reload_eeprom(struct net_device *dev);
608 static void natsemi_stop_rxtx(struct net_device *dev);
609 static int netdev_open(struct net_device *dev);
610 static void do_cable_magic(struct net_device *dev);
611 static void undo_cable_magic(struct net_device *dev);
612 static void check_link(struct net_device *dev);
613 static void netdev_timer(unsigned long data);
614 static void dump_ring(struct net_device *dev);
615 static void ns_tx_timeout(struct net_device *dev);
616 static int alloc_ring(struct net_device *dev);
617 static void refill_rx(struct net_device *dev);
618 static void init_ring(struct net_device *dev);
619 static void drain_tx(struct net_device *dev);
620 static void drain_ring(struct net_device *dev);
621 static void free_ring(struct net_device *dev);
622 static void reinit_ring(struct net_device *dev);
623 static void init_registers(struct net_device *dev);
624 static int start_tx(struct sk_buff *skb, struct net_device *dev);
625 static irqreturn_t intr_handler(int irq, void *dev_instance);
626 static void netdev_error(struct net_device *dev, int intr_status);
627 static int natsemi_poll(struct napi_struct *napi, int budget);
628 static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do);
629 static void netdev_tx_done(struct net_device *dev);
630 static int natsemi_change_mtu(struct net_device *dev, int new_mtu);
631 #ifdef CONFIG_NET_POLL_CONTROLLER
632 static void natsemi_poll_controller(struct net_device *dev);
634 static void __set_rx_mode(struct net_device *dev);
635 static void set_rx_mode(struct net_device *dev);
636 static void __get_stats(struct net_device *dev);
637 static struct net_device_stats *get_stats(struct net_device *dev);
638 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
639 static int netdev_set_wol(struct net_device *dev, u32 newval);
640 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur);
641 static int netdev_set_sopass(struct net_device *dev, u8 *newval);
642 static int netdev_get_sopass(struct net_device *dev, u8 *data);
643 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
644 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
645 static void enable_wol_mode(struct net_device *dev, int enable_intr);
646 static int netdev_close(struct net_device *dev);
647 static int netdev_get_regs(struct net_device *dev, u8 *buf);
648 static int netdev_get_eeprom(struct net_device *dev, u8 *buf);
649 static const struct ethtool_ops ethtool_ops;
651 #define NATSEMI_ATTR(_name) \
652 static ssize_t natsemi_show_##_name(struct device *dev, \
653 struct device_attribute *attr, char *buf); \
654 static ssize_t natsemi_set_##_name(struct device *dev, \
655 struct device_attribute *attr, \
656 const char *buf, size_t count); \
657 static DEVICE_ATTR(_name, 0644, natsemi_show_##_name, natsemi_set_##_name)
659 #define NATSEMI_CREATE_FILE(_dev, _name) \
660 device_create_file(&_dev->dev, &dev_attr_##_name)
661 #define NATSEMI_REMOVE_FILE(_dev, _name) \
662 device_remove_file(&_dev->dev, &dev_attr_##_name)
664 NATSEMI_ATTR(dspcfg_workaround);
666 static ssize_t natsemi_show_dspcfg_workaround(struct device *dev,
667 struct device_attribute *attr,
670 struct netdev_private *np = netdev_priv(to_net_dev(dev));
672 return sprintf(buf, "%s\n", np->dspcfg_workaround ? "on" : "off");
675 static ssize_t natsemi_set_dspcfg_workaround(struct device *dev,
676 struct device_attribute *attr,
677 const char *buf, size_t count)
679 struct netdev_private *np = netdev_priv(to_net_dev(dev));
683 /* Find out the new setting */
684 if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
686 else if (!strncmp("off", buf, count - 1)
687 || !strncmp("0", buf, count - 1))
692 spin_lock_irqsave(&np->lock, flags);
694 np->dspcfg_workaround = new_setting;
696 spin_unlock_irqrestore(&np->lock, flags);
701 static inline void __iomem *ns_ioaddr(struct net_device *dev)
703 return (void __iomem *) dev->base_addr;
706 static inline void natsemi_irq_enable(struct net_device *dev)
708 writel(1, ns_ioaddr(dev) + IntrEnable);
709 readl(ns_ioaddr(dev) + IntrEnable);
712 static inline void natsemi_irq_disable(struct net_device *dev)
714 writel(0, ns_ioaddr(dev) + IntrEnable);
715 readl(ns_ioaddr(dev) + IntrEnable);
718 static void move_int_phy(struct net_device *dev, int addr)
720 struct netdev_private *np = netdev_priv(dev);
721 void __iomem *ioaddr = ns_ioaddr(dev);
725 * The internal phy is visible on the external mii bus. Therefore we must
726 * move it away before we can send commands to an external phy.
727 * There are two addresses we must avoid:
728 * - the address on the external phy that is used for transmission.
729 * - the address that we want to access. User space can access phys
730 * on the mii bus with SIOCGMIIREG/SIOCSMIIREG, independant from the
731 * phy that is used for transmission.
736 if (target == np->phy_addr_external)
738 writew(target, ioaddr + PhyCtrl);
739 readw(ioaddr + PhyCtrl);
743 static void __devinit natsemi_init_media (struct net_device *dev)
745 struct netdev_private *np = netdev_priv(dev);
749 netif_carrier_on(dev);
751 netif_carrier_off(dev);
753 /* get the initial settings from hardware */
754 tmp = mdio_read(dev, MII_BMCR);
755 np->speed = (tmp & BMCR_SPEED100)? SPEED_100 : SPEED_10;
756 np->duplex = (tmp & BMCR_FULLDPLX)? DUPLEX_FULL : DUPLEX_HALF;
757 np->autoneg = (tmp & BMCR_ANENABLE)? AUTONEG_ENABLE: AUTONEG_DISABLE;
758 np->advertising= mdio_read(dev, MII_ADVERTISE);
760 if ((np->advertising & ADVERTISE_ALL) != ADVERTISE_ALL
761 && netif_msg_probe(np)) {
762 printk(KERN_INFO "natsemi %s: Transceiver default autonegotiation %s "
764 pci_name(np->pci_dev),
765 (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE)?
766 "enabled, advertise" : "disabled, force",
768 (ADVERTISE_100FULL|ADVERTISE_100HALF))?
771 (ADVERTISE_100FULL|ADVERTISE_10FULL))?
774 if (netif_msg_probe(np))
776 "natsemi %s: Transceiver status %#04x advertising %#04x.\n",
777 pci_name(np->pci_dev), mdio_read(dev, MII_BMSR),
782 static int __devinit natsemi_probe1 (struct pci_dev *pdev,
783 const struct pci_device_id *ent)
785 struct net_device *dev;
786 struct netdev_private *np;
787 int i, option, irq, chip_idx = ent->driver_data;
788 static int find_cnt = -1;
789 resource_size_t iostart;
790 unsigned long iosize;
791 void __iomem *ioaddr;
792 const int pcibar = 1; /* PCI base address register */
795 DECLARE_MAC_BUF(mac);
797 /* when built into the kernel, we only print version if device is found */
799 static int printed_version;
800 if (!printed_version++)
804 i = pci_enable_device(pdev);
807 /* natsemi has a non-standard PM control register
808 * in PCI config space. Some boards apparently need
809 * to be brought to D0 in this manner.
811 pci_read_config_dword(pdev, PCIPM, &tmp);
812 if (tmp & PCI_PM_CTRL_STATE_MASK) {
813 /* D0 state, disable PME assertion */
814 u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK;
815 pci_write_config_dword(pdev, PCIPM, newtmp);
819 iostart = pci_resource_start(pdev, pcibar);
820 iosize = pci_resource_len(pdev, pcibar);
823 pci_set_master(pdev);
825 dev = alloc_etherdev(sizeof (struct netdev_private));
828 SET_NETDEV_DEV(dev, &pdev->dev);
830 i = pci_request_regions(pdev, DRV_NAME);
832 goto err_pci_request_regions;
834 ioaddr = ioremap(iostart, iosize);
840 /* Work around the dropped serial bit. */
841 prev_eedata = eeprom_read(ioaddr, 6);
842 for (i = 0; i < 3; i++) {
843 int eedata = eeprom_read(ioaddr, i + 7);
844 dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15);
845 dev->dev_addr[i*2+1] = eedata >> 7;
846 prev_eedata = eedata;
849 dev->base_addr = (unsigned long __force) ioaddr;
852 np = netdev_priv(dev);
853 netif_napi_add(dev, &np->napi, natsemi_poll, 64);
857 pci_set_drvdata(pdev, dev);
859 spin_lock_init(&np->lock);
860 np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG;
863 np->eeprom_size = natsemi_pci_info[chip_idx].eeprom_size;
864 if (natsemi_pci_info[chip_idx].flags & NATSEMI_FLAG_IGNORE_PHY)
868 np->dspcfg_workaround = dspcfg_workaround;
871 * - If configured to ignore the PHY set up for external.
872 * - If the nic was configured to use an external phy and if find_mii
873 * finds a phy: use external port, first phy that replies.
874 * - Otherwise: internal port.
875 * Note that the phy address for the internal phy doesn't matter:
876 * The address would be used to access a phy over the mii bus, but
877 * the internal phy is accessed through mapped registers.
879 if (np->ignore_phy || readl(ioaddr + ChipConfig) & CfgExtPhy)
880 dev->if_port = PORT_MII;
882 dev->if_port = PORT_TP;
883 /* Reset the chip to erase previous misconfiguration. */
884 natsemi_reload_eeprom(dev);
887 if (dev->if_port != PORT_TP) {
888 np->phy_addr_external = find_mii(dev);
889 /* If we're ignoring the PHY it doesn't matter if we can't
891 if (!np->ignore_phy && np->phy_addr_external == PHY_ADDR_NONE) {
892 dev->if_port = PORT_TP;
893 np->phy_addr_external = PHY_ADDR_INTERNAL;
896 np->phy_addr_external = PHY_ADDR_INTERNAL;
899 option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
901 option = dev->mem_start;
903 /* The lower four bits are the media type. */
909 "natsemi %s: ignoring user supplied media type %d",
910 pci_name(np->pci_dev), option & 15);
912 if (find_cnt < MAX_UNITS && full_duplex[find_cnt])
915 /* The chip-specific entries in the device structure. */
916 dev->open = &netdev_open;
917 dev->hard_start_xmit = &start_tx;
918 dev->stop = &netdev_close;
919 dev->get_stats = &get_stats;
920 dev->set_multicast_list = &set_rx_mode;
921 dev->change_mtu = &natsemi_change_mtu;
922 dev->do_ioctl = &netdev_ioctl;
923 dev->tx_timeout = &ns_tx_timeout;
924 dev->watchdog_timeo = TX_TIMEOUT;
926 #ifdef CONFIG_NET_POLL_CONTROLLER
927 dev->poll_controller = &natsemi_poll_controller;
929 SET_ETHTOOL_OPS(dev, ðtool_ops);
934 natsemi_init_media(dev);
936 /* save the silicon revision for later querying */
937 np->srr = readl(ioaddr + SiliconRev);
938 if (netif_msg_hw(np))
939 printk(KERN_INFO "natsemi %s: silicon revision %#04x.\n",
940 pci_name(np->pci_dev), np->srr);
942 i = register_netdev(dev);
944 goto err_register_netdev;
946 if (NATSEMI_CREATE_FILE(pdev, dspcfg_workaround))
947 goto err_create_file;
949 if (netif_msg_drv(np)) {
950 printk(KERN_INFO "natsemi %s: %s at %#08llx "
952 dev->name, natsemi_pci_info[chip_idx].name,
953 (unsigned long long)iostart, pci_name(np->pci_dev),
954 print_mac(mac, dev->dev_addr), irq);
955 if (dev->if_port == PORT_TP)
956 printk(", port TP.\n");
957 else if (np->ignore_phy)
958 printk(", port MII, ignoring PHY\n");
960 printk(", port MII, phy ad %d.\n", np->phy_addr_external);
965 unregister_netdev(dev);
971 pci_release_regions(pdev);
972 pci_set_drvdata(pdev, NULL);
974 err_pci_request_regions:
980 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
981 The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */
983 /* Delay between EEPROM clock transitions.
984 No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
985 a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
986 made udelay() unreliable.
987 The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
990 #define eeprom_delay(ee_addr) readl(ee_addr)
992 #define EE_Write0 (EE_ChipSelect)
993 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
995 /* The EEPROM commands include the alway-set leading bit. */
997 EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
1000 static int eeprom_read(void __iomem *addr, int location)
1004 void __iomem *ee_addr = addr + EECtrl;
1005 int read_cmd = location | EE_ReadCmd;
1007 writel(EE_Write0, ee_addr);
1009 /* Shift the read command bits out. */
1010 for (i = 10; i >= 0; i--) {
1011 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
1012 writel(dataval, ee_addr);
1013 eeprom_delay(ee_addr);
1014 writel(dataval | EE_ShiftClk, ee_addr);
1015 eeprom_delay(ee_addr);
1017 writel(EE_ChipSelect, ee_addr);
1018 eeprom_delay(ee_addr);
1020 for (i = 0; i < 16; i++) {
1021 writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
1022 eeprom_delay(ee_addr);
1023 retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0;
1024 writel(EE_ChipSelect, ee_addr);
1025 eeprom_delay(ee_addr);
1028 /* Terminate the EEPROM access. */
1029 writel(EE_Write0, ee_addr);
1034 /* MII transceiver control section.
1035 * The 83815 series has an internal transceiver, and we present the
1036 * internal management registers as if they were MII connected.
1037 * External Phy registers are referenced through the MII interface.
1040 /* clock transitions >= 20ns (25MHz)
1041 * One readl should be good to PCI @ 100MHz
1043 #define mii_delay(ioaddr) readl(ioaddr + EECtrl)
1045 static int mii_getbit (struct net_device *dev)
1048 void __iomem *ioaddr = ns_ioaddr(dev);
1050 writel(MII_ShiftClk, ioaddr + EECtrl);
1051 data = readl(ioaddr + EECtrl);
1052 writel(0, ioaddr + EECtrl);
1054 return (data & MII_Data)? 1 : 0;
1057 static void mii_send_bits (struct net_device *dev, u32 data, int len)
1060 void __iomem *ioaddr = ns_ioaddr(dev);
1062 for (i = (1 << (len-1)); i; i >>= 1)
1064 u32 mdio_val = MII_Write | ((data & i)? MII_Data : 0);
1065 writel(mdio_val, ioaddr + EECtrl);
1067 writel(mdio_val | MII_ShiftClk, ioaddr + EECtrl);
1070 writel(0, ioaddr + EECtrl);
1074 static int miiport_read(struct net_device *dev, int phy_id, int reg)
1081 mii_send_bits (dev, 0xffffffff, 32);
1082 /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
1083 /* ST,OP = 0110'b for read operation */
1084 cmd = (0x06 << 10) | (phy_id << 5) | reg;
1085 mii_send_bits (dev, cmd, 14);
1087 if (mii_getbit (dev))
1090 for (i = 0; i < 16; i++) {
1092 retval |= mii_getbit (dev);
1099 static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data)
1104 mii_send_bits (dev, 0xffffffff, 32);
1105 /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
1106 /* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */
1107 cmd = (0x5002 << 16) | (phy_id << 23) | (reg << 18) | data;
1108 mii_send_bits (dev, cmd, 32);
1113 static int mdio_read(struct net_device *dev, int reg)
1115 struct netdev_private *np = netdev_priv(dev);
1116 void __iomem *ioaddr = ns_ioaddr(dev);
1118 /* The 83815 series has two ports:
1119 * - an internal transceiver
1120 * - an external mii bus
1122 if (dev->if_port == PORT_TP)
1123 return readw(ioaddr+BasicControl+(reg<<2));
1125 return miiport_read(dev, np->phy_addr_external, reg);
1128 static void mdio_write(struct net_device *dev, int reg, u16 data)
1130 struct netdev_private *np = netdev_priv(dev);
1131 void __iomem *ioaddr = ns_ioaddr(dev);
1133 /* The 83815 series has an internal transceiver; handle separately */
1134 if (dev->if_port == PORT_TP)
1135 writew(data, ioaddr+BasicControl+(reg<<2));
1137 miiport_write(dev, np->phy_addr_external, reg, data);
1140 static void init_phy_fixup(struct net_device *dev)
1142 struct netdev_private *np = netdev_priv(dev);
1143 void __iomem *ioaddr = ns_ioaddr(dev);
1148 /* restore stuff lost when power was out */
1149 tmp = mdio_read(dev, MII_BMCR);
1150 if (np->autoneg == AUTONEG_ENABLE) {
1151 /* renegotiate if something changed */
1152 if ((tmp & BMCR_ANENABLE) == 0
1153 || np->advertising != mdio_read(dev, MII_ADVERTISE))
1155 /* turn on autonegotiation and force negotiation */
1156 tmp |= (BMCR_ANENABLE | BMCR_ANRESTART);
1157 mdio_write(dev, MII_ADVERTISE, np->advertising);
1160 /* turn off auto negotiation, set speed and duplexity */
1161 tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
1162 if (np->speed == SPEED_100)
1163 tmp |= BMCR_SPEED100;
1164 if (np->duplex == DUPLEX_FULL)
1165 tmp |= BMCR_FULLDPLX;
1167 * Note: there is no good way to inform the link partner
1168 * that our capabilities changed. The user has to unplug
1169 * and replug the network cable after some changes, e.g.
1170 * after switching from 10HD, autoneg off to 100 HD,
1174 mdio_write(dev, MII_BMCR, tmp);
1175 readl(ioaddr + ChipConfig);
1178 /* find out what phy this is */
1179 np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
1180 + mdio_read(dev, MII_PHYSID2);
1182 /* handle external phys here */
1184 case PHYID_AM79C874:
1185 /* phy specific configuration for fibre/tp operation */
1186 tmp = mdio_read(dev, MII_MCTRL);
1187 tmp &= ~(MII_FX_SEL | MII_EN_SCRM);
1188 if (dev->if_port == PORT_FIBRE)
1192 mdio_write(dev, MII_MCTRL, tmp);
1197 cfg = readl(ioaddr + ChipConfig);
1198 if (cfg & CfgExtPhy)
1201 /* On page 78 of the spec, they recommend some settings for "optimum
1202 performance" to be done in sequence. These settings optimize some
1203 of the 100Mbit autodetection circuitry. They say we only want to
1204 do this for rev C of the chip, but engineers at NSC (Bradley
1205 Kennedy) recommends always setting them. If you don't, you get
1206 errors on some autonegotiations that make the device unusable.
1208 It seems that the DSP needs a few usec to reinitialize after
1209 the start of the phy. Just retry writing these values until they
1212 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1215 writew(1, ioaddr + PGSEL);
1216 writew(PMDCSR_VAL, ioaddr + PMDCSR);
1217 writew(TSTDAT_VAL, ioaddr + TSTDAT);
1218 np->dspcfg = (np->srr <= SRR_DP83815_C)?
1219 DSPCFG_VAL : (DSPCFG_COEF | readw(ioaddr + DSPCFG));
1220 writew(np->dspcfg, ioaddr + DSPCFG);
1221 writew(SDCFG_VAL, ioaddr + SDCFG);
1222 writew(0, ioaddr + PGSEL);
1223 readl(ioaddr + ChipConfig);
1226 writew(1, ioaddr + PGSEL);
1227 dspcfg = readw(ioaddr + DSPCFG);
1228 writew(0, ioaddr + PGSEL);
1229 if (np->dspcfg == dspcfg)
1233 if (netif_msg_link(np)) {
1234 if (i==NATSEMI_HW_TIMEOUT) {
1236 "%s: DSPCFG mismatch after retrying for %d usec.\n",
1240 "%s: DSPCFG accepted after %d usec.\n",
1245 * Enable PHY Specific event based interrupts. Link state change
1246 * and Auto-Negotiation Completion are among the affected.
1247 * Read the intr status to clear it (needed for wake events).
1249 readw(ioaddr + MIntrStatus);
1250 writew(MICRIntEn, ioaddr + MIntrCtrl);
1253 static int switch_port_external(struct net_device *dev)
1255 struct netdev_private *np = netdev_priv(dev);
1256 void __iomem *ioaddr = ns_ioaddr(dev);
1259 cfg = readl(ioaddr + ChipConfig);
1260 if (cfg & CfgExtPhy)
1263 if (netif_msg_link(np)) {
1264 printk(KERN_INFO "%s: switching to external transceiver.\n",
1268 /* 1) switch back to external phy */
1269 writel(cfg | (CfgExtPhy | CfgPhyDis), ioaddr + ChipConfig);
1270 readl(ioaddr + ChipConfig);
1273 /* 2) reset the external phy: */
1274 /* resetting the external PHY has been known to cause a hub supplying
1275 * power over Ethernet to kill the power. We don't want to kill
1276 * power to this computer, so we avoid resetting the phy.
1279 /* 3) reinit the phy fixup, it got lost during power down. */
1280 move_int_phy(dev, np->phy_addr_external);
1281 init_phy_fixup(dev);
1286 static int switch_port_internal(struct net_device *dev)
1288 struct netdev_private *np = netdev_priv(dev);
1289 void __iomem *ioaddr = ns_ioaddr(dev);
1294 cfg = readl(ioaddr + ChipConfig);
1295 if (!(cfg &CfgExtPhy))
1298 if (netif_msg_link(np)) {
1299 printk(KERN_INFO "%s: switching to internal transceiver.\n",
1302 /* 1) switch back to internal phy: */
1303 cfg = cfg & ~(CfgExtPhy | CfgPhyDis);
1304 writel(cfg, ioaddr + ChipConfig);
1305 readl(ioaddr + ChipConfig);
1308 /* 2) reset the internal phy: */
1309 bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
1310 writel(bmcr | BMCR_RESET, ioaddr+BasicControl+(MII_BMCR<<2));
1311 readl(ioaddr + ChipConfig);
1313 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1314 bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
1315 if (!(bmcr & BMCR_RESET))
1319 if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) {
1321 "%s: phy reset did not complete in %d usec.\n",
1324 /* 3) reinit the phy fixup, it got lost during power down. */
1325 init_phy_fixup(dev);
1330 /* Scan for a PHY on the external mii bus.
1331 * There are two tricky points:
1332 * - Do not scan while the internal phy is enabled. The internal phy will
1333 * crash: e.g. reads from the DSPCFG register will return odd values and
1334 * the nasty random phy reset code will reset the nic every few seconds.
1335 * - The internal phy must be moved around, an external phy could
1336 * have the same address as the internal phy.
1338 static int find_mii(struct net_device *dev)
1340 struct netdev_private *np = netdev_priv(dev);
1345 /* Switch to external phy */
1346 did_switch = switch_port_external(dev);
1348 /* Scan the possible phy addresses:
1350 * PHY address 0 means that the phy is in isolate mode. Not yet
1351 * supported due to lack of test hardware. User space should
1352 * handle it through ethtool.
1354 for (i = 1; i <= 31; i++) {
1355 move_int_phy(dev, i);
1356 tmp = miiport_read(dev, i, MII_BMSR);
1357 if (tmp != 0xffff && tmp != 0x0000) {
1358 /* found something! */
1359 np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
1360 + mdio_read(dev, MII_PHYSID2);
1361 if (netif_msg_probe(np)) {
1362 printk(KERN_INFO "natsemi %s: found external phy %08x at address %d.\n",
1363 pci_name(np->pci_dev), np->mii, i);
1368 /* And switch back to internal phy: */
1370 switch_port_internal(dev);
1374 /* CFG bits [13:16] [18:23] */
1375 #define CFG_RESET_SAVE 0xfde000
1376 /* WCSR bits [0:4] [9:10] */
1377 #define WCSR_RESET_SAVE 0x61f
1378 /* RFCR bits [20] [22] [27:31] */
1379 #define RFCR_RESET_SAVE 0xf8500000;
1381 static void natsemi_reset(struct net_device *dev)
1389 struct netdev_private *np = netdev_priv(dev);
1390 void __iomem *ioaddr = ns_ioaddr(dev);
1393 * Resetting the chip causes some registers to be lost.
1394 * Natsemi suggests NOT reloading the EEPROM while live, so instead
1395 * we save the state that would have been loaded from EEPROM
1396 * on a normal power-up (see the spec EEPROM map). This assumes
1397 * whoever calls this will follow up with init_registers() eventually.
1401 cfg = readl(ioaddr + ChipConfig) & CFG_RESET_SAVE;
1403 wcsr = readl(ioaddr + WOLCmd) & WCSR_RESET_SAVE;
1405 rfcr = readl(ioaddr + RxFilterAddr) & RFCR_RESET_SAVE;
1407 for (i = 0; i < 3; i++) {
1408 writel(i*2, ioaddr + RxFilterAddr);
1409 pmatch[i] = readw(ioaddr + RxFilterData);
1412 for (i = 0; i < 3; i++) {
1413 writel(0xa+(i*2), ioaddr + RxFilterAddr);
1414 sopass[i] = readw(ioaddr + RxFilterData);
1417 /* now whack the chip */
1418 writel(ChipReset, ioaddr + ChipCmd);
1419 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1420 if (!(readl(ioaddr + ChipCmd) & ChipReset))
1424 if (i==NATSEMI_HW_TIMEOUT) {
1425 printk(KERN_WARNING "%s: reset did not complete in %d usec.\n",
1427 } else if (netif_msg_hw(np)) {
1428 printk(KERN_DEBUG "%s: reset completed in %d usec.\n",
1433 cfg |= readl(ioaddr + ChipConfig) & ~CFG_RESET_SAVE;
1434 /* turn on external phy if it was selected */
1435 if (dev->if_port == PORT_TP)
1436 cfg &= ~(CfgExtPhy | CfgPhyDis);
1438 cfg |= (CfgExtPhy | CfgPhyDis);
1439 writel(cfg, ioaddr + ChipConfig);
1441 wcsr |= readl(ioaddr + WOLCmd) & ~WCSR_RESET_SAVE;
1442 writel(wcsr, ioaddr + WOLCmd);
1444 rfcr |= readl(ioaddr + RxFilterAddr) & ~RFCR_RESET_SAVE;
1445 /* restore PMATCH */
1446 for (i = 0; i < 3; i++) {
1447 writel(i*2, ioaddr + RxFilterAddr);
1448 writew(pmatch[i], ioaddr + RxFilterData);
1450 for (i = 0; i < 3; i++) {
1451 writel(0xa+(i*2), ioaddr + RxFilterAddr);
1452 writew(sopass[i], ioaddr + RxFilterData);
1455 writel(rfcr, ioaddr + RxFilterAddr);
1458 static void reset_rx(struct net_device *dev)
1461 struct netdev_private *np = netdev_priv(dev);
1462 void __iomem *ioaddr = ns_ioaddr(dev);
1464 np->intr_status &= ~RxResetDone;
1466 writel(RxReset, ioaddr + ChipCmd);
1468 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1469 np->intr_status |= readl(ioaddr + IntrStatus);
1470 if (np->intr_status & RxResetDone)
1474 if (i==NATSEMI_HW_TIMEOUT) {
1475 printk(KERN_WARNING "%s: RX reset did not complete in %d usec.\n",
1477 } else if (netif_msg_hw(np)) {
1478 printk(KERN_WARNING "%s: RX reset took %d usec.\n",
1483 static void natsemi_reload_eeprom(struct net_device *dev)
1485 struct netdev_private *np = netdev_priv(dev);
1486 void __iomem *ioaddr = ns_ioaddr(dev);
1489 writel(EepromReload, ioaddr + PCIBusCfg);
1490 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1492 if (!(readl(ioaddr + PCIBusCfg) & EepromReload))
1495 if (i==NATSEMI_HW_TIMEOUT) {
1496 printk(KERN_WARNING "natsemi %s: EEPROM did not reload in %d usec.\n",
1497 pci_name(np->pci_dev), i*50);
1498 } else if (netif_msg_hw(np)) {
1499 printk(KERN_DEBUG "natsemi %s: EEPROM reloaded in %d usec.\n",
1500 pci_name(np->pci_dev), i*50);
1504 static void natsemi_stop_rxtx(struct net_device *dev)
1506 void __iomem * ioaddr = ns_ioaddr(dev);
1507 struct netdev_private *np = netdev_priv(dev);
1510 writel(RxOff | TxOff, ioaddr + ChipCmd);
1511 for(i=0;i< NATSEMI_HW_TIMEOUT;i++) {
1512 if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0)
1516 if (i==NATSEMI_HW_TIMEOUT) {
1517 printk(KERN_WARNING "%s: Tx/Rx process did not stop in %d usec.\n",
1519 } else if (netif_msg_hw(np)) {
1520 printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.\n",
1525 static int netdev_open(struct net_device *dev)
1527 struct netdev_private *np = netdev_priv(dev);
1528 void __iomem * ioaddr = ns_ioaddr(dev);
1531 /* Reset the chip, just in case. */
1534 i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev);
1537 if (netif_msg_ifup(np))
1538 printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
1539 dev->name, dev->irq);
1540 i = alloc_ring(dev);
1542 free_irq(dev->irq, dev);
1545 napi_enable(&np->napi);
1548 spin_lock_irq(&np->lock);
1549 init_registers(dev);
1550 /* now set the MAC address according to dev->dev_addr */
1551 for (i = 0; i < 3; i++) {
1552 u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i];
1554 writel(i*2, ioaddr + RxFilterAddr);
1555 writew(mac, ioaddr + RxFilterData);
1557 writel(np->cur_rx_mode, ioaddr + RxFilterAddr);
1558 spin_unlock_irq(&np->lock);
1560 netif_start_queue(dev);
1562 if (netif_msg_ifup(np))
1563 printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.\n",
1564 dev->name, (int)readl(ioaddr + ChipCmd));
1566 /* Set the timer to check for link beat. */
1567 init_timer(&np->timer);
1568 np->timer.expires = round_jiffies(jiffies + NATSEMI_TIMER_FREQ);
1569 np->timer.data = (unsigned long)dev;
1570 np->timer.function = &netdev_timer; /* timer handler */
1571 add_timer(&np->timer);
1576 static void do_cable_magic(struct net_device *dev)
1578 struct netdev_private *np = netdev_priv(dev);
1579 void __iomem *ioaddr = ns_ioaddr(dev);
1581 if (dev->if_port != PORT_TP)
1584 if (np->srr >= SRR_DP83816_A5)
1588 * 100 MBit links with short cables can trip an issue with the chip.
1589 * The problem manifests as lots of CRC errors and/or flickering
1590 * activity LED while idle. This process is based on instructions
1591 * from engineers at National.
1593 if (readl(ioaddr + ChipConfig) & CfgSpeed100) {
1596 writew(1, ioaddr + PGSEL);
1598 * coefficient visibility should already be enabled via
1601 data = readw(ioaddr + TSTDAT) & 0xff;
1603 * the value must be negative, and within certain values
1604 * (these values all come from National)
1606 if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) {
1607 np = netdev_priv(dev);
1609 /* the bug has been triggered - fix the coefficient */
1610 writew(TSTDAT_FIXED, ioaddr + TSTDAT);
1611 /* lock the value */
1612 data = readw(ioaddr + DSPCFG);
1613 np->dspcfg = data | DSPCFG_LOCK;
1614 writew(np->dspcfg, ioaddr + DSPCFG);
1616 writew(0, ioaddr + PGSEL);
1620 static void undo_cable_magic(struct net_device *dev)
1623 struct netdev_private *np = netdev_priv(dev);
1624 void __iomem * ioaddr = ns_ioaddr(dev);
1626 if (dev->if_port != PORT_TP)
1629 if (np->srr >= SRR_DP83816_A5)
1632 writew(1, ioaddr + PGSEL);
1633 /* make sure the lock bit is clear */
1634 data = readw(ioaddr + DSPCFG);
1635 np->dspcfg = data & ~DSPCFG_LOCK;
1636 writew(np->dspcfg, ioaddr + DSPCFG);
1637 writew(0, ioaddr + PGSEL);
1640 static void check_link(struct net_device *dev)
1642 struct netdev_private *np = netdev_priv(dev);
1643 void __iomem * ioaddr = ns_ioaddr(dev);
1644 int duplex = np->duplex;
1647 /* If we are ignoring the PHY then don't try reading it. */
1649 goto propagate_state;
1651 /* The link status field is latched: it remains low after a temporary
1652 * link failure until it's read. We need the current link status,
1655 mdio_read(dev, MII_BMSR);
1656 bmsr = mdio_read(dev, MII_BMSR);
1658 if (!(bmsr & BMSR_LSTATUS)) {
1659 if (netif_carrier_ok(dev)) {
1660 if (netif_msg_link(np))
1661 printk(KERN_NOTICE "%s: link down.\n",
1663 netif_carrier_off(dev);
1664 undo_cable_magic(dev);
1668 if (!netif_carrier_ok(dev)) {
1669 if (netif_msg_link(np))
1670 printk(KERN_NOTICE "%s: link up.\n", dev->name);
1671 netif_carrier_on(dev);
1672 do_cable_magic(dev);
1675 duplex = np->full_duplex;
1677 if (bmsr & BMSR_ANEGCOMPLETE) {
1678 int tmp = mii_nway_result(
1679 np->advertising & mdio_read(dev, MII_LPA));
1680 if (tmp == LPA_100FULL || tmp == LPA_10FULL)
1682 } else if (mdio_read(dev, MII_BMCR) & BMCR_FULLDPLX)
1687 /* if duplex is set then bit 28 must be set, too */
1688 if (duplex ^ !!(np->rx_config & RxAcceptTx)) {
1689 if (netif_msg_link(np))
1691 "%s: Setting %s-duplex based on negotiated "
1692 "link capability.\n", dev->name,
1693 duplex ? "full" : "half");
1695 np->rx_config |= RxAcceptTx;
1696 np->tx_config |= TxCarrierIgn | TxHeartIgn;
1698 np->rx_config &= ~RxAcceptTx;
1699 np->tx_config &= ~(TxCarrierIgn | TxHeartIgn);
1701 writel(np->tx_config, ioaddr + TxConfig);
1702 writel(np->rx_config, ioaddr + RxConfig);
1706 static void init_registers(struct net_device *dev)
1708 struct netdev_private *np = netdev_priv(dev);
1709 void __iomem * ioaddr = ns_ioaddr(dev);
1711 init_phy_fixup(dev);
1713 /* clear any interrupts that are pending, such as wake events */
1714 readl(ioaddr + IntrStatus);
1716 writel(np->ring_dma, ioaddr + RxRingPtr);
1717 writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc),
1718 ioaddr + TxRingPtr);
1720 /* Initialize other registers.
1721 * Configure the PCI bus bursts and FIFO thresholds.
1722 * Configure for standard, in-spec Ethernet.
1723 * Start with half-duplex. check_link will update
1724 * to the correct settings.
1727 /* DRTH: 2: start tx if 64 bytes are in the fifo
1728 * FLTH: 0x10: refill with next packet if 512 bytes are free
1729 * MXDMA: 0: up to 256 byte bursts.
1730 * MXDMA must be <= FLTH
1734 np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 |
1735 TX_FLTH_VAL | TX_DRTH_VAL_START;
1736 writel(np->tx_config, ioaddr + TxConfig);
1738 /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo
1739 * MXDMA 0: up to 256 byte bursts
1741 np->rx_config = RxMxdma_256 | RX_DRTH_VAL;
1742 /* if receive ring now has bigger buffers than normal, enable jumbo */
1743 if (np->rx_buf_sz > NATSEMI_LONGPKT)
1744 np->rx_config |= RxAcceptLong;
1746 writel(np->rx_config, ioaddr + RxConfig);
1749 * The PME bit is initialized from the EEPROM contents.
1750 * PCI cards probably have PME disabled, but motherboard
1751 * implementations may have PME set to enable WakeOnLan.
1752 * With PME set the chip will scan incoming packets but
1753 * nothing will be written to memory. */
1754 np->SavedClkRun = readl(ioaddr + ClkRun);
1755 writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun);
1756 if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) {
1757 printk(KERN_NOTICE "%s: Wake-up event %#08x\n",
1758 dev->name, readl(ioaddr + WOLCmd));
1764 /* Enable interrupts by setting the interrupt mask. */
1765 writel(DEFAULT_INTR, ioaddr + IntrMask);
1766 natsemi_irq_enable(dev);
1768 writel(RxOn | TxOn, ioaddr + ChipCmd);
1769 writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */
1775 * 1) check for link changes. Usually they are handled by the MII interrupt
1776 * but it doesn't hurt to check twice.
1777 * 2) check for sudden death of the NIC:
1778 * It seems that a reference set for this chip went out with incorrect info,
1779 * and there exist boards that aren't quite right. An unexpected voltage
1780 * drop can cause the PHY to get itself in a weird state (basically reset).
1781 * NOTE: this only seems to affect revC chips. The user can disable
1782 * this check via dspcfg_workaround sysfs option.
1783 * 3) check of death of the RX path due to OOM
1785 static void netdev_timer(unsigned long data)
1787 struct net_device *dev = (struct net_device *)data;
1788 struct netdev_private *np = netdev_priv(dev);
1789 void __iomem * ioaddr = ns_ioaddr(dev);
1790 int next_tick = NATSEMI_TIMER_FREQ;
1792 if (netif_msg_timer(np)) {
1793 /* DO NOT read the IntrStatus register,
1794 * a read clears any pending interrupts.
1796 printk(KERN_DEBUG "%s: Media selection timer tick.\n",
1800 if (dev->if_port == PORT_TP) {
1803 spin_lock_irq(&np->lock);
1804 /* check for a nasty random phy-reset - use dspcfg as a flag */
1805 writew(1, ioaddr+PGSEL);
1806 dspcfg = readw(ioaddr+DSPCFG);
1807 writew(0, ioaddr+PGSEL);
1808 if (np->dspcfg_workaround && dspcfg != np->dspcfg) {
1809 if (!netif_queue_stopped(dev)) {
1810 spin_unlock_irq(&np->lock);
1811 if (netif_msg_drv(np))
1812 printk(KERN_NOTICE "%s: possible phy reset: "
1813 "re-initializing\n", dev->name);
1814 disable_irq(dev->irq);
1815 spin_lock_irq(&np->lock);
1816 natsemi_stop_rxtx(dev);
1819 init_registers(dev);
1820 spin_unlock_irq(&np->lock);
1821 enable_irq(dev->irq);
1825 spin_unlock_irq(&np->lock);
1828 /* init_registers() calls check_link() for the above case */
1830 spin_unlock_irq(&np->lock);
1833 spin_lock_irq(&np->lock);
1835 spin_unlock_irq(&np->lock);
1838 disable_irq(dev->irq);
1841 enable_irq(dev->irq);
1843 writel(RxOn, ioaddr + ChipCmd);
1850 mod_timer(&np->timer, round_jiffies(jiffies + next_tick));
1852 mod_timer(&np->timer, jiffies + next_tick);
1855 static void dump_ring(struct net_device *dev)
1857 struct netdev_private *np = netdev_priv(dev);
1859 if (netif_msg_pktdata(np)) {
1861 printk(KERN_DEBUG " Tx ring at %p:\n", np->tx_ring);
1862 for (i = 0; i < TX_RING_SIZE; i++) {
1863 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1864 i, np->tx_ring[i].next_desc,
1865 np->tx_ring[i].cmd_status,
1866 np->tx_ring[i].addr);
1868 printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring);
1869 for (i = 0; i < RX_RING_SIZE; i++) {
1870 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1871 i, np->rx_ring[i].next_desc,
1872 np->rx_ring[i].cmd_status,
1873 np->rx_ring[i].addr);
1878 static void ns_tx_timeout(struct net_device *dev)
1880 struct netdev_private *np = netdev_priv(dev);
1881 void __iomem * ioaddr = ns_ioaddr(dev);
1883 disable_irq(dev->irq);
1884 spin_lock_irq(&np->lock);
1885 if (!np->hands_off) {
1886 if (netif_msg_tx_err(np))
1888 "%s: Transmit timed out, status %#08x,"
1890 dev->name, readl(ioaddr + IntrStatus));
1895 init_registers(dev);
1898 "%s: tx_timeout while in hands_off state?\n",
1901 spin_unlock_irq(&np->lock);
1902 enable_irq(dev->irq);
1904 dev->trans_start = jiffies;
1905 np->stats.tx_errors++;
1906 netif_wake_queue(dev);
1909 static int alloc_ring(struct net_device *dev)
1911 struct netdev_private *np = netdev_priv(dev);
1912 np->rx_ring = pci_alloc_consistent(np->pci_dev,
1913 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
1917 np->tx_ring = &np->rx_ring[RX_RING_SIZE];
1921 static void refill_rx(struct net_device *dev)
1923 struct netdev_private *np = netdev_priv(dev);
1925 /* Refill the Rx ring buffers. */
1926 for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
1927 struct sk_buff *skb;
1928 int entry = np->dirty_rx % RX_RING_SIZE;
1929 if (np->rx_skbuff[entry] == NULL) {
1930 unsigned int buflen = np->rx_buf_sz+NATSEMI_PADDING;
1931 skb = dev_alloc_skb(buflen);
1932 np->rx_skbuff[entry] = skb;
1934 break; /* Better luck next round. */
1935 skb->dev = dev; /* Mark as being used by this device. */
1936 np->rx_dma[entry] = pci_map_single(np->pci_dev,
1937 skb->data, buflen, PCI_DMA_FROMDEVICE);
1938 np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]);
1940 np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz);
1942 if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) {
1943 if (netif_msg_rx_err(np))
1944 printk(KERN_WARNING "%s: going OOM.\n", dev->name);
1949 static void set_bufsize(struct net_device *dev)
1951 struct netdev_private *np = netdev_priv(dev);
1952 if (dev->mtu <= ETH_DATA_LEN)
1953 np->rx_buf_sz = ETH_DATA_LEN + NATSEMI_HEADERS;
1955 np->rx_buf_sz = dev->mtu + NATSEMI_HEADERS;
1958 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1959 static void init_ring(struct net_device *dev)
1961 struct netdev_private *np = netdev_priv(dev);
1965 np->dirty_tx = np->cur_tx = 0;
1966 for (i = 0; i < TX_RING_SIZE; i++) {
1967 np->tx_skbuff[i] = NULL;
1968 np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1969 +sizeof(struct netdev_desc)
1970 *((i+1)%TX_RING_SIZE+RX_RING_SIZE));
1971 np->tx_ring[i].cmd_status = 0;
1976 np->cur_rx = RX_RING_SIZE;
1980 np->rx_head_desc = &np->rx_ring[0];
1982 /* Please be carefull before changing this loop - at least gcc-2.95.1
1983 * miscompiles it otherwise.
1985 /* Initialize all Rx descriptors. */
1986 for (i = 0; i < RX_RING_SIZE; i++) {
1987 np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1988 +sizeof(struct netdev_desc)
1989 *((i+1)%RX_RING_SIZE));
1990 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
1991 np->rx_skbuff[i] = NULL;
1997 static void drain_tx(struct net_device *dev)
1999 struct netdev_private *np = netdev_priv(dev);
2002 for (i = 0; i < TX_RING_SIZE; i++) {
2003 if (np->tx_skbuff[i]) {
2004 pci_unmap_single(np->pci_dev,
2005 np->tx_dma[i], np->tx_skbuff[i]->len,
2007 dev_kfree_skb(np->tx_skbuff[i]);
2008 np->stats.tx_dropped++;
2010 np->tx_skbuff[i] = NULL;
2014 static void drain_rx(struct net_device *dev)
2016 struct netdev_private *np = netdev_priv(dev);
2017 unsigned int buflen = np->rx_buf_sz;
2020 /* Free all the skbuffs in the Rx queue. */
2021 for (i = 0; i < RX_RING_SIZE; i++) {
2022 np->rx_ring[i].cmd_status = 0;
2023 np->rx_ring[i].addr = cpu_to_le32(0xBADF00D0); /* An invalid address. */
2024 if (np->rx_skbuff[i]) {
2025 pci_unmap_single(np->pci_dev,
2026 np->rx_dma[i], buflen,
2027 PCI_DMA_FROMDEVICE);
2028 dev_kfree_skb(np->rx_skbuff[i]);
2030 np->rx_skbuff[i] = NULL;
2034 static void drain_ring(struct net_device *dev)
2040 static void free_ring(struct net_device *dev)
2042 struct netdev_private *np = netdev_priv(dev);
2043 pci_free_consistent(np->pci_dev,
2044 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
2045 np->rx_ring, np->ring_dma);
2048 static void reinit_rx(struct net_device *dev)
2050 struct netdev_private *np = netdev_priv(dev);
2055 np->cur_rx = RX_RING_SIZE;
2056 np->rx_head_desc = &np->rx_ring[0];
2057 /* Initialize all Rx descriptors. */
2058 for (i = 0; i < RX_RING_SIZE; i++)
2059 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
2064 static void reinit_ring(struct net_device *dev)
2066 struct netdev_private *np = netdev_priv(dev);
2071 np->dirty_tx = np->cur_tx = 0;
2072 for (i=0;i<TX_RING_SIZE;i++)
2073 np->tx_ring[i].cmd_status = 0;
2078 static int start_tx(struct sk_buff *skb, struct net_device *dev)
2080 struct netdev_private *np = netdev_priv(dev);
2081 void __iomem * ioaddr = ns_ioaddr(dev);
2083 unsigned long flags;
2085 /* Note: Ordering is important here, set the field with the
2086 "ownership" bit last, and only then increment cur_tx. */
2088 /* Calculate the next Tx descriptor entry. */
2089 entry = np->cur_tx % TX_RING_SIZE;
2091 np->tx_skbuff[entry] = skb;
2092 np->tx_dma[entry] = pci_map_single(np->pci_dev,
2093 skb->data,skb->len, PCI_DMA_TODEVICE);
2095 np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]);
2097 spin_lock_irqsave(&np->lock, flags);
2099 if (!np->hands_off) {
2100 np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len);
2101 /* StrongARM: Explicitly cache flush np->tx_ring and
2102 * skb->data,skb->len. */
2105 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
2106 netdev_tx_done(dev);
2107 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1)
2108 netif_stop_queue(dev);
2110 /* Wake the potentially-idle transmit channel. */
2111 writel(TxOn, ioaddr + ChipCmd);
2113 dev_kfree_skb_irq(skb);
2114 np->stats.tx_dropped++;
2116 spin_unlock_irqrestore(&np->lock, flags);
2118 dev->trans_start = jiffies;
2120 if (netif_msg_tx_queued(np)) {
2121 printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
2122 dev->name, np->cur_tx, entry);
2127 static void netdev_tx_done(struct net_device *dev)
2129 struct netdev_private *np = netdev_priv(dev);
2131 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
2132 int entry = np->dirty_tx % TX_RING_SIZE;
2133 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn))
2135 if (netif_msg_tx_done(np))
2137 "%s: tx frame #%d finished, status %#08x.\n",
2138 dev->name, np->dirty_tx,
2139 le32_to_cpu(np->tx_ring[entry].cmd_status));
2140 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) {
2141 np->stats.tx_packets++;
2142 np->stats.tx_bytes += np->tx_skbuff[entry]->len;
2143 } else { /* Various Tx errors */
2145 le32_to_cpu(np->tx_ring[entry].cmd_status);
2146 if (tx_status & (DescTxAbort|DescTxExcColl))
2147 np->stats.tx_aborted_errors++;
2148 if (tx_status & DescTxFIFO)
2149 np->stats.tx_fifo_errors++;
2150 if (tx_status & DescTxCarrier)
2151 np->stats.tx_carrier_errors++;
2152 if (tx_status & DescTxOOWCol)
2153 np->stats.tx_window_errors++;
2154 np->stats.tx_errors++;
2156 pci_unmap_single(np->pci_dev,np->tx_dma[entry],
2157 np->tx_skbuff[entry]->len,
2159 /* Free the original skb. */
2160 dev_kfree_skb_irq(np->tx_skbuff[entry]);
2161 np->tx_skbuff[entry] = NULL;
2163 if (netif_queue_stopped(dev)
2164 && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
2165 /* The ring is no longer full, wake queue. */
2166 netif_wake_queue(dev);
2170 /* The interrupt handler doesn't actually handle interrupts itself, it
2171 * schedules a NAPI poll if there is anything to do. */
2172 static irqreturn_t intr_handler(int irq, void *dev_instance)
2174 struct net_device *dev = dev_instance;
2175 struct netdev_private *np = netdev_priv(dev);
2176 void __iomem * ioaddr = ns_ioaddr(dev);
2178 /* Reading IntrStatus automatically acknowledges so don't do
2179 * that while interrupts are disabled, (for example, while a
2180 * poll is scheduled). */
2181 if (np->hands_off || !readl(ioaddr + IntrEnable))
2184 np->intr_status = readl(ioaddr + IntrStatus);
2186 if (!np->intr_status)
2189 if (netif_msg_intr(np))
2191 "%s: Interrupt, status %#08x, mask %#08x.\n",
2192 dev->name, np->intr_status,
2193 readl(ioaddr + IntrMask));
2195 prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]);
2197 if (netif_rx_schedule_prep(dev, &np->napi)) {
2198 /* Disable interrupts and register for poll */
2199 natsemi_irq_disable(dev);
2200 __netif_rx_schedule(dev, &np->napi);
2203 "%s: Ignoring interrupt, status %#08x, mask %#08x.\n",
2204 dev->name, np->intr_status,
2205 readl(ioaddr + IntrMask));
2210 /* This is the NAPI poll routine. As well as the standard RX handling
2211 * it also handles all other interrupts that the chip might raise.
2213 static int natsemi_poll(struct napi_struct *napi, int budget)
2215 struct netdev_private *np = container_of(napi, struct netdev_private, napi);
2216 struct net_device *dev = np->dev;
2217 void __iomem * ioaddr = ns_ioaddr(dev);
2221 if (netif_msg_intr(np))
2223 "%s: Poll, status %#08x, mask %#08x.\n",
2224 dev->name, np->intr_status,
2225 readl(ioaddr + IntrMask));
2227 /* netdev_rx() may read IntrStatus again if the RX state
2228 * machine falls over so do it first. */
2229 if (np->intr_status &
2230 (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
2231 IntrRxErr | IntrRxOverrun)) {
2232 netdev_rx(dev, &work_done, budget);
2235 if (np->intr_status &
2236 (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) {
2237 spin_lock(&np->lock);
2238 netdev_tx_done(dev);
2239 spin_unlock(&np->lock);
2242 /* Abnormal error summary/uncommon events handlers. */
2243 if (np->intr_status & IntrAbnormalSummary)
2244 netdev_error(dev, np->intr_status);
2246 if (work_done >= budget)
2249 np->intr_status = readl(ioaddr + IntrStatus);
2250 } while (np->intr_status);
2252 netif_rx_complete(dev, napi);
2254 /* Reenable interrupts providing nothing is trying to shut
2256 spin_lock(&np->lock);
2258 natsemi_irq_enable(dev);
2259 spin_unlock(&np->lock);
2264 /* This routine is logically part of the interrupt handler, but separated
2265 for clarity and better register allocation. */
2266 static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do)
2268 struct netdev_private *np = netdev_priv(dev);
2269 int entry = np->cur_rx % RX_RING_SIZE;
2270 int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
2271 s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
2272 unsigned int buflen = np->rx_buf_sz;
2273 void __iomem * ioaddr = ns_ioaddr(dev);
2275 /* If the driver owns the next entry it's a new packet. Send it up. */
2276 while (desc_status < 0) { /* e.g. & DescOwn */
2278 if (netif_msg_rx_status(np))
2280 " netdev_rx() entry %d status was %#08x.\n",
2281 entry, desc_status);
2285 if (*work_done >= work_to_do)
2290 pkt_len = (desc_status & DescSizeMask) - 4;
2291 if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){
2292 if (desc_status & DescMore) {
2293 unsigned long flags;
2295 if (netif_msg_rx_err(np))
2297 "%s: Oversized(?) Ethernet "
2298 "frame spanned multiple "
2299 "buffers, entry %#08x "
2300 "status %#08x.\n", dev->name,
2301 np->cur_rx, desc_status);
2302 np->stats.rx_length_errors++;
2304 /* The RX state machine has probably
2305 * locked up beneath us. Follow the
2306 * reset procedure documented in
2309 spin_lock_irqsave(&np->lock, flags);
2312 writel(np->ring_dma, ioaddr + RxRingPtr);
2314 spin_unlock_irqrestore(&np->lock, flags);
2316 /* We'll enable RX on exit from this
2321 /* There was an error. */
2322 np->stats.rx_errors++;
2323 if (desc_status & (DescRxAbort|DescRxOver))
2324 np->stats.rx_over_errors++;
2325 if (desc_status & (DescRxLong|DescRxRunt))
2326 np->stats.rx_length_errors++;
2327 if (desc_status & (DescRxInvalid|DescRxAlign))
2328 np->stats.rx_frame_errors++;
2329 if (desc_status & DescRxCRC)
2330 np->stats.rx_crc_errors++;
2332 } else if (pkt_len > np->rx_buf_sz) {
2333 /* if this is the tail of a double buffer
2334 * packet, we've already counted the error
2335 * on the first part. Ignore the second half.
2338 struct sk_buff *skb;
2339 /* Omit CRC size. */
2340 /* Check if the packet is long enough to accept
2341 * without copying to a minimally-sized skbuff. */
2342 if (pkt_len < rx_copybreak
2343 && (skb = dev_alloc_skb(pkt_len + RX_OFFSET)) != NULL) {
2344 /* 16 byte align the IP header */
2345 skb_reserve(skb, RX_OFFSET);
2346 pci_dma_sync_single_for_cpu(np->pci_dev,
2349 PCI_DMA_FROMDEVICE);
2350 skb_copy_to_linear_data(skb,
2351 np->rx_skbuff[entry]->data, pkt_len);
2352 skb_put(skb, pkt_len);
2353 pci_dma_sync_single_for_device(np->pci_dev,
2356 PCI_DMA_FROMDEVICE);
2358 pci_unmap_single(np->pci_dev, np->rx_dma[entry],
2359 buflen, PCI_DMA_FROMDEVICE);
2360 skb_put(skb = np->rx_skbuff[entry], pkt_len);
2361 np->rx_skbuff[entry] = NULL;
2363 skb->protocol = eth_type_trans(skb, dev);
2364 netif_receive_skb(skb);
2365 dev->last_rx = jiffies;
2366 np->stats.rx_packets++;
2367 np->stats.rx_bytes += pkt_len;
2369 entry = (++np->cur_rx) % RX_RING_SIZE;
2370 np->rx_head_desc = &np->rx_ring[entry];
2371 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
2375 /* Restart Rx engine if stopped. */
2377 mod_timer(&np->timer, jiffies + 1);
2379 writel(RxOn, ioaddr + ChipCmd);
2382 static void netdev_error(struct net_device *dev, int intr_status)
2384 struct netdev_private *np = netdev_priv(dev);
2385 void __iomem * ioaddr = ns_ioaddr(dev);
2387 spin_lock(&np->lock);
2388 if (intr_status & LinkChange) {
2389 u16 lpa = mdio_read(dev, MII_LPA);
2390 if (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE
2391 && netif_msg_link(np)) {
2393 "%s: Autonegotiation advertising"
2394 " %#04x partner %#04x.\n", dev->name,
2395 np->advertising, lpa);
2398 /* read MII int status to clear the flag */
2399 readw(ioaddr + MIntrStatus);
2402 if (intr_status & StatsMax) {
2405 if (intr_status & IntrTxUnderrun) {
2406 if ((np->tx_config & TxDrthMask) < TX_DRTH_VAL_LIMIT) {
2407 np->tx_config += TX_DRTH_VAL_INC;
2408 if (netif_msg_tx_err(np))
2410 "%s: increased tx threshold, txcfg %#08x.\n",
2411 dev->name, np->tx_config);
2413 if (netif_msg_tx_err(np))
2415 "%s: tx underrun with maximum tx threshold, txcfg %#08x.\n",
2416 dev->name, np->tx_config);
2418 writel(np->tx_config, ioaddr + TxConfig);
2420 if (intr_status & WOLPkt && netif_msg_wol(np)) {
2421 int wol_status = readl(ioaddr + WOLCmd);
2422 printk(KERN_NOTICE "%s: Link wake-up event %#08x\n",
2423 dev->name, wol_status);
2425 if (intr_status & RxStatusFIFOOver) {
2426 if (netif_msg_rx_err(np) && netif_msg_intr(np)) {
2427 printk(KERN_NOTICE "%s: Rx status FIFO overrun\n",
2430 np->stats.rx_fifo_errors++;
2431 np->stats.rx_errors++;
2433 /* Hmmmmm, it's not clear how to recover from PCI faults. */
2434 if (intr_status & IntrPCIErr) {
2435 printk(KERN_NOTICE "%s: PCI error %#08x\n", dev->name,
2436 intr_status & IntrPCIErr);
2437 np->stats.tx_fifo_errors++;
2438 np->stats.tx_errors++;
2439 np->stats.rx_fifo_errors++;
2440 np->stats.rx_errors++;
2442 spin_unlock(&np->lock);
2445 static void __get_stats(struct net_device *dev)
2447 void __iomem * ioaddr = ns_ioaddr(dev);
2448 struct netdev_private *np = netdev_priv(dev);
2450 /* The chip only need report frame silently dropped. */
2451 np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs);
2452 np->stats.rx_missed_errors += readl(ioaddr + RxMissed);
2455 static struct net_device_stats *get_stats(struct net_device *dev)
2457 struct netdev_private *np = netdev_priv(dev);
2459 /* The chip only need report frame silently dropped. */
2460 spin_lock_irq(&np->lock);
2461 if (netif_running(dev) && !np->hands_off)
2463 spin_unlock_irq(&np->lock);
2468 #ifdef CONFIG_NET_POLL_CONTROLLER
2469 static void natsemi_poll_controller(struct net_device *dev)
2471 disable_irq(dev->irq);
2472 intr_handler(dev->irq, dev);
2473 enable_irq(dev->irq);
2477 #define HASH_TABLE 0x200
2478 static void __set_rx_mode(struct net_device *dev)
2480 void __iomem * ioaddr = ns_ioaddr(dev);
2481 struct netdev_private *np = netdev_priv(dev);
2482 u8 mc_filter[64]; /* Multicast hash filter */
2485 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
2486 rx_mode = RxFilterEnable | AcceptBroadcast
2487 | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys;
2488 } else if ((dev->mc_count > multicast_filter_limit)
2489 || (dev->flags & IFF_ALLMULTI)) {
2490 rx_mode = RxFilterEnable | AcceptBroadcast
2491 | AcceptAllMulticast | AcceptMyPhys;
2493 struct dev_mc_list *mclist;
2495 memset(mc_filter, 0, sizeof(mc_filter));
2496 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
2497 i++, mclist = mclist->next) {
2498 int b = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff;
2499 mc_filter[b/8] |= (1 << (b & 0x07));
2501 rx_mode = RxFilterEnable | AcceptBroadcast
2502 | AcceptMulticast | AcceptMyPhys;
2503 for (i = 0; i < 64; i += 2) {
2504 writel(HASH_TABLE + i, ioaddr + RxFilterAddr);
2505 writel((mc_filter[i + 1] << 8) + mc_filter[i],
2506 ioaddr + RxFilterData);
2509 writel(rx_mode, ioaddr + RxFilterAddr);
2510 np->cur_rx_mode = rx_mode;
2513 static int natsemi_change_mtu(struct net_device *dev, int new_mtu)
2515 if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS)
2520 /* synchronized against open : rtnl_lock() held by caller */
2521 if (netif_running(dev)) {
2522 struct netdev_private *np = netdev_priv(dev);
2523 void __iomem * ioaddr = ns_ioaddr(dev);
2525 disable_irq(dev->irq);
2526 spin_lock(&np->lock);
2528 natsemi_stop_rxtx(dev);
2529 /* drain rx queue */
2531 /* change buffers */
2534 writel(np->ring_dma, ioaddr + RxRingPtr);
2535 /* restart engines */
2536 writel(RxOn | TxOn, ioaddr + ChipCmd);
2537 spin_unlock(&np->lock);
2538 enable_irq(dev->irq);
2543 static void set_rx_mode(struct net_device *dev)
2545 struct netdev_private *np = netdev_priv(dev);
2546 spin_lock_irq(&np->lock);
2549 spin_unlock_irq(&np->lock);
2552 static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2554 struct netdev_private *np = netdev_priv(dev);
2555 strncpy(info->driver, DRV_NAME, ETHTOOL_BUSINFO_LEN);
2556 strncpy(info->version, DRV_VERSION, ETHTOOL_BUSINFO_LEN);
2557 strncpy(info->bus_info, pci_name(np->pci_dev), ETHTOOL_BUSINFO_LEN);
2560 static int get_regs_len(struct net_device *dev)
2562 return NATSEMI_REGS_SIZE;
2565 static int get_eeprom_len(struct net_device *dev)
2567 struct netdev_private *np = netdev_priv(dev);
2568 return np->eeprom_size;
2571 static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
2573 struct netdev_private *np = netdev_priv(dev);
2574 spin_lock_irq(&np->lock);
2575 netdev_get_ecmd(dev, ecmd);
2576 spin_unlock_irq(&np->lock);
2580 static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
2582 struct netdev_private *np = netdev_priv(dev);
2584 spin_lock_irq(&np->lock);
2585 res = netdev_set_ecmd(dev, ecmd);
2586 spin_unlock_irq(&np->lock);
2590 static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2592 struct netdev_private *np = netdev_priv(dev);
2593 spin_lock_irq(&np->lock);
2594 netdev_get_wol(dev, &wol->supported, &wol->wolopts);
2595 netdev_get_sopass(dev, wol->sopass);
2596 spin_unlock_irq(&np->lock);
2599 static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2601 struct netdev_private *np = netdev_priv(dev);
2603 spin_lock_irq(&np->lock);
2604 netdev_set_wol(dev, wol->wolopts);
2605 res = netdev_set_sopass(dev, wol->sopass);
2606 spin_unlock_irq(&np->lock);
2610 static void get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
2612 struct netdev_private *np = netdev_priv(dev);
2613 regs->version = NATSEMI_REGS_VER;
2614 spin_lock_irq(&np->lock);
2615 netdev_get_regs(dev, buf);
2616 spin_unlock_irq(&np->lock);
2619 static u32 get_msglevel(struct net_device *dev)
2621 struct netdev_private *np = netdev_priv(dev);
2622 return np->msg_enable;
2625 static void set_msglevel(struct net_device *dev, u32 val)
2627 struct netdev_private *np = netdev_priv(dev);
2628 np->msg_enable = val;
2631 static int nway_reset(struct net_device *dev)
2635 /* if autoneg is off, it's an error */
2636 tmp = mdio_read(dev, MII_BMCR);
2637 if (tmp & BMCR_ANENABLE) {
2638 tmp |= (BMCR_ANRESTART);
2639 mdio_write(dev, MII_BMCR, tmp);
2645 static u32 get_link(struct net_device *dev)
2647 /* LSTATUS is latched low until a read - so read twice */
2648 mdio_read(dev, MII_BMSR);
2649 return (mdio_read(dev, MII_BMSR)&BMSR_LSTATUS) ? 1:0;
2652 static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
2654 struct netdev_private *np = netdev_priv(dev);
2658 eebuf = kmalloc(np->eeprom_size, GFP_KERNEL);
2662 eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
2663 spin_lock_irq(&np->lock);
2664 res = netdev_get_eeprom(dev, eebuf);
2665 spin_unlock_irq(&np->lock);
2667 memcpy(data, eebuf+eeprom->offset, eeprom->len);
2672 static const struct ethtool_ops ethtool_ops = {
2673 .get_drvinfo = get_drvinfo,
2674 .get_regs_len = get_regs_len,
2675 .get_eeprom_len = get_eeprom_len,
2676 .get_settings = get_settings,
2677 .set_settings = set_settings,
2680 .get_regs = get_regs,
2681 .get_msglevel = get_msglevel,
2682 .set_msglevel = set_msglevel,
2683 .nway_reset = nway_reset,
2684 .get_link = get_link,
2685 .get_eeprom = get_eeprom,
2688 static int netdev_set_wol(struct net_device *dev, u32 newval)
2690 struct netdev_private *np = netdev_priv(dev);
2691 void __iomem * ioaddr = ns_ioaddr(dev);
2692 u32 data = readl(ioaddr + WOLCmd) & ~WakeOptsSummary;
2694 /* translate to bitmasks this chip understands */
2695 if (newval & WAKE_PHY)
2697 if (newval & WAKE_UCAST)
2698 data |= WakeUnicast;
2699 if (newval & WAKE_MCAST)
2700 data |= WakeMulticast;
2701 if (newval & WAKE_BCAST)
2702 data |= WakeBroadcast;
2703 if (newval & WAKE_ARP)
2705 if (newval & WAKE_MAGIC)
2707 if (np->srr >= SRR_DP83815_D) {
2708 if (newval & WAKE_MAGICSECURE) {
2709 data |= WakeMagicSecure;
2713 writel(data, ioaddr + WOLCmd);
2718 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur)
2720 struct netdev_private *np = netdev_priv(dev);
2721 void __iomem * ioaddr = ns_ioaddr(dev);
2722 u32 regval = readl(ioaddr + WOLCmd);
2724 *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST
2725 | WAKE_ARP | WAKE_MAGIC);
2727 if (np->srr >= SRR_DP83815_D) {
2728 /* SOPASS works on revD and higher */
2729 *supported |= WAKE_MAGICSECURE;
2733 /* translate from chip bitmasks */
2734 if (regval & WakePhy)
2736 if (regval & WakeUnicast)
2738 if (regval & WakeMulticast)
2740 if (regval & WakeBroadcast)
2742 if (regval & WakeArp)
2744 if (regval & WakeMagic)
2746 if (regval & WakeMagicSecure) {
2747 /* this can be on in revC, but it's broken */
2748 *cur |= WAKE_MAGICSECURE;
2754 static int netdev_set_sopass(struct net_device *dev, u8 *newval)
2756 struct netdev_private *np = netdev_priv(dev);
2757 void __iomem * ioaddr = ns_ioaddr(dev);
2758 u16 *sval = (u16 *)newval;
2761 if (np->srr < SRR_DP83815_D) {
2765 /* enable writing to these registers by disabling the RX filter */
2766 addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
2767 addr &= ~RxFilterEnable;
2768 writel(addr, ioaddr + RxFilterAddr);
2770 /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */
2771 writel(addr | 0xa, ioaddr + RxFilterAddr);
2772 writew(sval[0], ioaddr + RxFilterData);
2774 writel(addr | 0xc, ioaddr + RxFilterAddr);
2775 writew(sval[1], ioaddr + RxFilterData);
2777 writel(addr | 0xe, ioaddr + RxFilterAddr);
2778 writew(sval[2], ioaddr + RxFilterData);
2780 /* re-enable the RX filter */
2781 writel(addr | RxFilterEnable, ioaddr + RxFilterAddr);
2786 static int netdev_get_sopass(struct net_device *dev, u8 *data)
2788 struct netdev_private *np = netdev_priv(dev);
2789 void __iomem * ioaddr = ns_ioaddr(dev);
2790 u16 *sval = (u16 *)data;
2793 if (np->srr < SRR_DP83815_D) {
2794 sval[0] = sval[1] = sval[2] = 0;
2798 /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */
2799 addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
2801 writel(addr | 0xa, ioaddr + RxFilterAddr);
2802 sval[0] = readw(ioaddr + RxFilterData);
2804 writel(addr | 0xc, ioaddr + RxFilterAddr);
2805 sval[1] = readw(ioaddr + RxFilterData);
2807 writel(addr | 0xe, ioaddr + RxFilterAddr);
2808 sval[2] = readw(ioaddr + RxFilterData);
2810 writel(addr, ioaddr + RxFilterAddr);
2815 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2817 struct netdev_private *np = netdev_priv(dev);
2820 ecmd->port = dev->if_port;
2821 ecmd->speed = np->speed;
2822 ecmd->duplex = np->duplex;
2823 ecmd->autoneg = np->autoneg;
2824 ecmd->advertising = 0;
2825 if (np->advertising & ADVERTISE_10HALF)
2826 ecmd->advertising |= ADVERTISED_10baseT_Half;
2827 if (np->advertising & ADVERTISE_10FULL)
2828 ecmd->advertising |= ADVERTISED_10baseT_Full;
2829 if (np->advertising & ADVERTISE_100HALF)
2830 ecmd->advertising |= ADVERTISED_100baseT_Half;
2831 if (np->advertising & ADVERTISE_100FULL)
2832 ecmd->advertising |= ADVERTISED_100baseT_Full;
2833 ecmd->supported = (SUPPORTED_Autoneg |
2834 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2835 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2836 SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE);
2837 ecmd->phy_address = np->phy_addr_external;
2839 * We intentionally report the phy address of the external
2840 * phy, even if the internal phy is used. This is necessary
2841 * to work around a deficiency of the ethtool interface:
2842 * It's only possible to query the settings of the active
2844 * # ethtool -s ethX port mii
2845 * actually sends an ioctl to switch to port mii with the
2846 * settings that are used for the current active port.
2847 * If we would report a different phy address in this
2849 * # ethtool -s ethX port tp;ethtool -s ethX port mii
2850 * would unintentionally change the phy address.
2852 * Fortunately the phy address doesn't matter with the
2856 /* set information based on active port type */
2857 switch (ecmd->port) {
2860 ecmd->advertising |= ADVERTISED_TP;
2861 ecmd->transceiver = XCVR_INTERNAL;
2864 ecmd->advertising |= ADVERTISED_MII;
2865 ecmd->transceiver = XCVR_EXTERNAL;
2868 ecmd->advertising |= ADVERTISED_FIBRE;
2869 ecmd->transceiver = XCVR_EXTERNAL;
2873 /* if autonegotiation is on, try to return the active speed/duplex */
2874 if (ecmd->autoneg == AUTONEG_ENABLE) {
2875 ecmd->advertising |= ADVERTISED_Autoneg;
2876 tmp = mii_nway_result(
2877 np->advertising & mdio_read(dev, MII_LPA));
2878 if (tmp == LPA_100FULL || tmp == LPA_100HALF)
2879 ecmd->speed = SPEED_100;
2881 ecmd->speed = SPEED_10;
2882 if (tmp == LPA_100FULL || tmp == LPA_10FULL)
2883 ecmd->duplex = DUPLEX_FULL;
2885 ecmd->duplex = DUPLEX_HALF;
2888 /* ignore maxtxpkt, maxrxpkt for now */
2893 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2895 struct netdev_private *np = netdev_priv(dev);
2897 if (ecmd->port != PORT_TP && ecmd->port != PORT_MII && ecmd->port != PORT_FIBRE)
2899 if (ecmd->transceiver != XCVR_INTERNAL && ecmd->transceiver != XCVR_EXTERNAL)
2901 if (ecmd->autoneg == AUTONEG_ENABLE) {
2902 if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
2903 ADVERTISED_10baseT_Full |
2904 ADVERTISED_100baseT_Half |
2905 ADVERTISED_100baseT_Full)) == 0) {
2908 } else if (ecmd->autoneg == AUTONEG_DISABLE) {
2909 if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
2911 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
2918 * If we're ignoring the PHY then autoneg and the internal
2919 * transciever are really not going to work so don't let the
2922 if (np->ignore_phy && (ecmd->autoneg == AUTONEG_ENABLE ||
2923 ecmd->port == PORT_TP))
2927 * maxtxpkt, maxrxpkt: ignored for now.
2930 * PORT_TP is always XCVR_INTERNAL, PORT_MII and PORT_FIBRE are always
2931 * XCVR_EXTERNAL. The implementation thus ignores ecmd->transceiver and
2932 * selects based on ecmd->port.
2934 * Actually PORT_FIBRE is nearly identical to PORT_MII: it's for fibre
2935 * phys that are connected to the mii bus. It's used to apply fibre
2939 /* WHEW! now lets bang some bits */
2941 /* save the parms */
2942 dev->if_port = ecmd->port;
2943 np->autoneg = ecmd->autoneg;
2944 np->phy_addr_external = ecmd->phy_address & PhyAddrMask;
2945 if (np->autoneg == AUTONEG_ENABLE) {
2946 /* advertise only what has been requested */
2947 np->advertising &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
2948 if (ecmd->advertising & ADVERTISED_10baseT_Half)
2949 np->advertising |= ADVERTISE_10HALF;
2950 if (ecmd->advertising & ADVERTISED_10baseT_Full)
2951 np->advertising |= ADVERTISE_10FULL;
2952 if (ecmd->advertising & ADVERTISED_100baseT_Half)
2953 np->advertising |= ADVERTISE_100HALF;
2954 if (ecmd->advertising & ADVERTISED_100baseT_Full)
2955 np->advertising |= ADVERTISE_100FULL;
2957 np->speed = ecmd->speed;
2958 np->duplex = ecmd->duplex;
2959 /* user overriding the initial full duplex parm? */
2960 if (np->duplex == DUPLEX_HALF)
2961 np->full_duplex = 0;
2964 /* get the right phy enabled */
2965 if (ecmd->port == PORT_TP)
2966 switch_port_internal(dev);
2968 switch_port_external(dev);
2970 /* set parms and see how this affected our link status */
2971 init_phy_fixup(dev);
2976 static int netdev_get_regs(struct net_device *dev, u8 *buf)
2981 u32 *rbuf = (u32 *)buf;
2982 void __iomem * ioaddr = ns_ioaddr(dev);
2984 /* read non-mii page 0 of registers */
2985 for (i = 0; i < NATSEMI_PG0_NREGS/2; i++) {
2986 rbuf[i] = readl(ioaddr + i*4);
2989 /* read current mii registers */
2990 for (i = NATSEMI_PG0_NREGS/2; i < NATSEMI_PG0_NREGS; i++)
2991 rbuf[i] = mdio_read(dev, i & 0x1f);
2993 /* read only the 'magic' registers from page 1 */
2994 writew(1, ioaddr + PGSEL);
2995 rbuf[i++] = readw(ioaddr + PMDCSR);
2996 rbuf[i++] = readw(ioaddr + TSTDAT);
2997 rbuf[i++] = readw(ioaddr + DSPCFG);
2998 rbuf[i++] = readw(ioaddr + SDCFG);
2999 writew(0, ioaddr + PGSEL);
3001 /* read RFCR indexed registers */
3002 rfcr = readl(ioaddr + RxFilterAddr);
3003 for (j = 0; j < NATSEMI_RFDR_NREGS; j++) {
3004 writel(j*2, ioaddr + RxFilterAddr);
3005 rbuf[i++] = readw(ioaddr + RxFilterData);
3007 writel(rfcr, ioaddr + RxFilterAddr);
3009 /* the interrupt status is clear-on-read - see if we missed any */
3010 if (rbuf[4] & rbuf[5]) {
3012 "%s: shoot, we dropped an interrupt (%#08x)\n",
3013 dev->name, rbuf[4] & rbuf[5]);
3019 #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13) \
3020 | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9) \
3021 | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5) \
3022 | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1) \
3023 | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3) \
3024 | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7) \
3025 | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11) \
3026 | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) )
3028 static int netdev_get_eeprom(struct net_device *dev, u8 *buf)
3031 u16 *ebuf = (u16 *)buf;
3032 void __iomem * ioaddr = ns_ioaddr(dev);
3033 struct netdev_private *np = netdev_priv(dev);
3035 /* eeprom_read reads 16 bits, and indexes by 16 bits */
3036 for (i = 0; i < np->eeprom_size/2; i++) {
3037 ebuf[i] = eeprom_read(ioaddr, i);
3038 /* The EEPROM itself stores data bit-swapped, but eeprom_read
3039 * reads it back "sanely". So we swap it back here in order to
3040 * present it to userland as it is stored. */
3041 ebuf[i] = SWAP_BITS(ebuf[i]);
3046 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3048 struct mii_ioctl_data *data = if_mii(rq);
3049 struct netdev_private *np = netdev_priv(dev);
3052 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
3053 case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
3054 data->phy_id = np->phy_addr_external;
3057 case SIOCGMIIREG: /* Read MII PHY register. */
3058 case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
3059 /* The phy_id is not enough to uniquely identify
3060 * the intended target. Therefore the command is sent to
3061 * the given mii on the current port.
3063 if (dev->if_port == PORT_TP) {
3064 if ((data->phy_id & 0x1f) == np->phy_addr_external)
3065 data->val_out = mdio_read(dev,
3066 data->reg_num & 0x1f);
3070 move_int_phy(dev, data->phy_id & 0x1f);
3071 data->val_out = miiport_read(dev, data->phy_id & 0x1f,
3072 data->reg_num & 0x1f);
3076 case SIOCSMIIREG: /* Write MII PHY register. */
3077 case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
3078 if (!capable(CAP_NET_ADMIN))
3080 if (dev->if_port == PORT_TP) {
3081 if ((data->phy_id & 0x1f) == np->phy_addr_external) {
3082 if ((data->reg_num & 0x1f) == MII_ADVERTISE)
3083 np->advertising = data->val_in;
3084 mdio_write(dev, data->reg_num & 0x1f,
3088 if ((data->phy_id & 0x1f) == np->phy_addr_external) {
3089 if ((data->reg_num & 0x1f) == MII_ADVERTISE)
3090 np->advertising = data->val_in;
3092 move_int_phy(dev, data->phy_id & 0x1f);
3093 miiport_write(dev, data->phy_id & 0x1f,
3094 data->reg_num & 0x1f,
3103 static void enable_wol_mode(struct net_device *dev, int enable_intr)
3105 void __iomem * ioaddr = ns_ioaddr(dev);
3106 struct netdev_private *np = netdev_priv(dev);
3108 if (netif_msg_wol(np))
3109 printk(KERN_INFO "%s: remaining active for wake-on-lan\n",
3112 /* For WOL we must restart the rx process in silent mode.
3113 * Write NULL to the RxRingPtr. Only possible if
3114 * rx process is stopped
3116 writel(0, ioaddr + RxRingPtr);
3118 /* read WoL status to clear */
3119 readl(ioaddr + WOLCmd);
3121 /* PME on, clear status */
3122 writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun);
3124 /* and restart the rx process */
3125 writel(RxOn, ioaddr + ChipCmd);
3128 /* enable the WOL interrupt.
3129 * Could be used to send a netlink message.
3131 writel(WOLPkt | LinkChange, ioaddr + IntrMask);
3132 natsemi_irq_enable(dev);
3136 static int netdev_close(struct net_device *dev)
3138 void __iomem * ioaddr = ns_ioaddr(dev);
3139 struct netdev_private *np = netdev_priv(dev);
3141 if (netif_msg_ifdown(np))
3143 "%s: Shutting down ethercard, status was %#04x.\n",
3144 dev->name, (int)readl(ioaddr + ChipCmd));
3145 if (netif_msg_pktdata(np))
3147 "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
3148 dev->name, np->cur_tx, np->dirty_tx,
3149 np->cur_rx, np->dirty_rx);
3151 napi_disable(&np->napi);
3154 * FIXME: what if someone tries to close a device
3155 * that is suspended?
3156 * Should we reenable the nic to switch to
3157 * the final WOL settings?
3160 del_timer_sync(&np->timer);
3161 disable_irq(dev->irq);
3162 spin_lock_irq(&np->lock);
3163 natsemi_irq_disable(dev);
3165 spin_unlock_irq(&np->lock);
3166 enable_irq(dev->irq);
3168 free_irq(dev->irq, dev);
3170 /* Interrupt disabled, interrupt handler released,
3171 * queue stopped, timer deleted, rtnl_lock held
3172 * All async codepaths that access the driver are disabled.
3174 spin_lock_irq(&np->lock);
3176 readl(ioaddr + IntrMask);
3177 readw(ioaddr + MIntrStatus);
3180 writel(StatsFreeze, ioaddr + StatsCtrl);
3182 /* Stop the chip's Tx and Rx processes. */
3183 natsemi_stop_rxtx(dev);
3186 spin_unlock_irq(&np->lock);
3188 /* clear the carrier last - an interrupt could reenable it otherwise */
3189 netif_carrier_off(dev);
3190 netif_stop_queue(dev);
3197 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
3199 /* restart the NIC in WOL mode.
3200 * The nic must be stopped for this.
3202 enable_wol_mode(dev, 0);
3204 /* Restore PME enable bit unmolested */
3205 writel(np->SavedClkRun, ioaddr + ClkRun);
3212 static void __devexit natsemi_remove1 (struct pci_dev *pdev)
3214 struct net_device *dev = pci_get_drvdata(pdev);
3215 void __iomem * ioaddr = ns_ioaddr(dev);
3217 NATSEMI_REMOVE_FILE(pdev, dspcfg_workaround);
3218 unregister_netdev (dev);
3219 pci_release_regions (pdev);
3222 pci_set_drvdata(pdev, NULL);
3228 * The ns83815 chip doesn't have explicit RxStop bits.
3229 * Kicking the Rx or Tx process for a new packet reenables the Rx process
3230 * of the nic, thus this function must be very careful:
3232 * suspend/resume synchronization:
3234 * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler,
3235 * start_tx, ns_tx_timeout
3237 * No function accesses the hardware without checking np->hands_off.
3238 * the check occurs under spin_lock_irq(&np->lock);
3240 * * netdev_ioctl: noncritical access.
3241 * * netdev_open: cannot happen due to the device_detach
3242 * * netdev_close: doesn't hurt.
3243 * * netdev_timer: timer stopped by natsemi_suspend.
3244 * * intr_handler: doesn't acquire the spinlock. suspend calls
3245 * disable_irq() to enforce synchronization.
3246 * * natsemi_poll: checks before reenabling interrupts. suspend
3247 * sets hands_off, disables interrupts and then waits with
3250 * Interrupts must be disabled, otherwise hands_off can cause irq storms.
3253 static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state)
3255 struct net_device *dev = pci_get_drvdata (pdev);
3256 struct netdev_private *np = netdev_priv(dev);
3257 void __iomem * ioaddr = ns_ioaddr(dev);
3260 if (netif_running (dev)) {
3261 del_timer_sync(&np->timer);
3263 disable_irq(dev->irq);
3264 spin_lock_irq(&np->lock);
3266 natsemi_irq_disable(dev);
3268 natsemi_stop_rxtx(dev);
3269 netif_stop_queue(dev);
3271 spin_unlock_irq(&np->lock);
3272 enable_irq(dev->irq);
3274 napi_disable(&np->napi);
3276 /* Update the error counts. */
3279 /* pci_power_off(pdev, -1); */
3282 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
3283 /* Restore PME enable bit */
3285 /* restart the NIC in WOL mode.
3286 * The nic must be stopped for this.
3287 * FIXME: use the WOL interrupt
3289 enable_wol_mode(dev, 0);
3291 /* Restore PME enable bit unmolested */
3292 writel(np->SavedClkRun, ioaddr + ClkRun);
3296 netif_device_detach(dev);
3302 static int natsemi_resume (struct pci_dev *pdev)
3304 struct net_device *dev = pci_get_drvdata (pdev);
3305 struct netdev_private *np = netdev_priv(dev);
3309 if (netif_device_present(dev))
3311 if (netif_running(dev)) {
3312 BUG_ON(!np->hands_off);
3313 ret = pci_enable_device(pdev);
3316 "pci_enable_device() failed: %d\n", ret);
3319 /* pci_power_on(pdev); */
3321 napi_enable(&np->napi);
3325 disable_irq(dev->irq);
3326 spin_lock_irq(&np->lock);
3328 init_registers(dev);
3329 netif_device_attach(dev);
3330 spin_unlock_irq(&np->lock);
3331 enable_irq(dev->irq);
3333 mod_timer(&np->timer, round_jiffies(jiffies + 1*HZ));
3335 netif_device_attach(dev);
3341 #endif /* CONFIG_PM */
3343 static struct pci_driver natsemi_driver = {
3345 .id_table = natsemi_pci_tbl,
3346 .probe = natsemi_probe1,
3347 .remove = __devexit_p(natsemi_remove1),
3349 .suspend = natsemi_suspend,
3350 .resume = natsemi_resume,
3354 static int __init natsemi_init_mod (void)
3356 /* when a module, this is printed whether or not devices are found in probe */
3361 return pci_register_driver(&natsemi_driver);
3364 static void __exit natsemi_exit_mod (void)
3366 pci_unregister_driver (&natsemi_driver);
3369 module_init(natsemi_init_mod);
3370 module_exit(natsemi_exit_mod);